//定义
#include <SDL2/SDL.h>
#include <SDL2/SDL_ttf.h>
#include <SDL2/SDL_image.h>
extern SDL_Window *win;
extern SDL_Renderer *ren;
void draw_line(SDL_Point *point,SDL_Point *point2);
void refresh();
void draw_text(char *text,SDL_Point pos,SDL_Color color, int size);
void draw_sprite(SDL_Point *point);
SDL_Surface *read_img(char *file);
void play_bgm();
